6. If female: the patient was premenarchal, or was incapable of pregnancy because of a hysterectomy, tubal ligation, or spousal/partner sterility. If sexually active and capable of pregnancy, the patient must have been using an acceptable method of contraception (hormonal contraceptives, intrauterine device, spermicide and barrier) for at least 1 month prior to study entry and agreed to continue to use one of them for the duration of the study. If sexually abstinent and capable of pregnancy, the patient agreed to continue abstinence or to use of an acceptable method of birth control (either intrauterine device or spermicide and barrier) should sexual activity commence.